Question 76731
{{{((5*a)*y+(5*a)*3)+(x*(-y)+x*(-3))}}}
{{{(5*a*y+5*a*3)+(-x*y-x*3)}}}
{{{(5*a*y+5*3*a)+(-x*y-3*x)}}}
{{{(5*a*y+15*a)+(-x*y-3*x)}}}
{{{5*a*y+15*a-x*y-3*x}}}

Good Luck!